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May 26, 1931. i F. DAUGHADAY COLLAR BUTTON Filed Oct. 2'7, 1930 2 Sheets-She at 1 z 1 1 1 I 1 I 1 I 1 I m n i May 26, 1931; F. P. DAUGHADAY COLLAR BUTTON 2 Sheets-Sheet 2 Filed Oct. 27, 1930 flab; Aw WM ATTORNEYS.

Patented May 26, 1931 UNITED STATES PATENT oFFicE V FRANK P. DAUGHADAY, OF PROVIDENCE,-RHODE ISLAND COLLAR summon Application filed October 27, 1930.

My present invention relates to collar but- 7 tons and similar articles of personal jewelry, and has particular reference to the manufac' ture of one-piece collar buttons with non-circular bases.

The present procedure in manufacturing collar buttons with non-circular bases, preferably substantially square in outline, is to draw out-or hammer a top member with the desired base outline, then position a flanged cap member over the base, and finally roll the flanges of the cap member over the edge of the base. This procedure requires both atop and a cap member, and necessitates a double thickness of metal at the base.

It has been found feasible, however, to manufacture a one-piece collar button with a non-circular, and preferably substantially square base, thus eliminating severalmanufacturing operations, and reducing the amount of material required. The principal object of my invention is to produce a onepiece collar button having a non-circular base.

With this object in view, the invention consists of a novel sequence of manufacturing steps and a novel arrangement of parts more fully described in the detailed description following, in conjunction with the accompanying drawings, and more particularly specified in the appended claims.

In the drawings: j

Fig. 1 is a perspective view of a metal blank for the one-piece collar button;

Fig. 2 is a section of the blank after the hammering operation, and Fig. 3 is a plan View thereof;

Fig. 4 is a section of the trimming operation, and Fig. 5 is a plan View thereof; 7

Fig. 6 is a section of the blank after .the cupping operation;

Figs. 7 and 8 are respectively an elevation and a section of the finished button after the edge-rolling operation; and

Fig. 9 is a section on the line 99 of Fig. 8, showing the generally square outline of the base.

It has been found desirable to manufacture a one-piece collar button having a generally blank after the Serial No. 491,518.

square base, thus eliminating the use of a separate cap element and. conserving both manufacturing time and cost and material cost. This is accomplished byadding a trimmingand a cupping operation to the hamand is then subjected to a thinning, straight ening, and trimming operation to produce the blank 12 shown in Figs. 4 and 5. The blank '12 has substantially square sides 13, which are cupped up as shown in Fig. 6, to provide the blank 14 with an upturned flange 15.

This upturned flange is then rolled over to produce the finished one-piece collar button 16 with a rolled edge 17 of substantially square outline. The head 18 and'the shank 19 of the collar button are similar to the usual forms for these elements, depending on whether the collar button is designed forfront or back use.

In rolling the edge of the button the same slightly changes the shape thereof due to the different radii of the periphery and thus I must allow to some extent for this different shape and trim the flange 15 differently than the shape I desire in the finished form.

The improved method therefore provides a sequence of operations on a single blank, and eliminates the usual cap element, thus reducing the manufacturing cost and the amount of material required, the resulting collar button having a base of substantially square outline.

.While-I have described a specific method and a specific article, it is obvious that desired changes in procedure and in preparation may be made without departing from the spirit and the scope of the invention as defined in the appended claims.

Iclaim:

1. The method of forming a one-piece collar button with a non-circular symmetrical base, including the steps of drawing a sheet metal blank into cup shape with a flange on its edge, hammering the cup to provide a thin shank with a hollow head at the closed end, trimming the flange to provide a noncircular shape similar to but diiierent than the desired finished shape, rolling the marginal edge of the flange throughout its peripheral extent inwardly to provide a finished rolled edge with a periphery of a desired non-circular symmetrical shape and a shape different than the shape of the trimmed flange.

2. The method of forming a one-piece collar button with non-circular symmetrical base, including the steps of drawing a sheet metal blank into cup shape with a flange on its edge, hammering the cup to provide a thin shank With a hollow head at the closed end, trimming the flange to provide a noncircular shape similar to but difierent than the desired finished shape, rolling the marginal edge of the flange throughout its peripheral extent inwardly and stretching the same diiierently at different arcuate sections along its periphery to provide a finished unbroken rolled edge with a periphery oi. as a desired non-circular symmetrical shape and a shape diiierent than the shape of the trimmed flange due to the different stretching of the differently shaped sections of the periphery. In testimony whereof I affix my signature.

FRANK P. DAUGHADAY. 

